C2: Structure and Bonding

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  • Created on: 11-03-16 17:00
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  • C2: Structure and Bonding
    • Elements react to form compounds by gaining, losing or by sharing electrons.
    • Ionic bonding holds oppositely charged ions together in giant structures/ lattices - packed neatly together.
      • Strong forces of attraction act throughout the lattice.
    • The charges on the ionic compound always cancel each other out.
    • Covalent bonds join atoms together to form molecules.
      • e.g. carbon can form several bonds and join together in giant covalent structures - macromolecules.
    • Atoms in metals - closely packed together and arranged in regular layers.
  • Dot and cross diagrams can be used to represent the atoms and ions involved in forming ionic bonds.
  • Ionic compounds are neutral.
  • Electrons in the highest energy level are delocalised and can move freely between atoms.
    • Produces a lattice of + ions in a 'sea' of moving electrons.
    • Delocalised electrons strongly attract the + ions, holding the giant structure together.


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